This is just Phase 1 of the project -- the full 28-acre development, which will include an additional $9 billion investment, more towers and a school, will be completed by 2025. In the meantime, there will be a number of grand opening activities over the course of the weekend to celebrate Part I, with fun performances from a number of artists. Also check out:

The Shops & Restaurants, New York City’s premier shopping and dining destination located at 20 Hudson Yards. The one-million-square-foot retail center brings more than 100 diverse stores, including the city's first Neiman Marcus, and culinary experiences across all food and price points

The Public Square and Gardens, one of the signature spaces at Hudson Yards, containing five acres of public plazas, gardens and groves designed by Nelson Byrd Woltz Landscape Architects in collaboration with Heatherwick Studio. The new park space connects to the High Line, Hudson Park & Boulevard and Bella Abzug Park, creating a continuous chain of open spaces on the West Side from Gansevoort Street to Times Square. It's the largest network of public spaces developed in Manhattan since Central Park. It's one part of the 14 acres of open space at Hudson Yards.

Vessel, the centerpiece of the Hudson Yards Public Square and Gardens, and the City’s new urban landmark designed by Thomas Heatherwick and Heatherwick Studio. Comprised of 154 intricately-interconnecting flights of stairs, 2,500 individual steps and 80 landings, Vessel offers the public a one-mile vertical climbing experience and some of the most unique views of Manhattan’s West Side. Free entrance with timed ticketing details are now available here.

The development of Hudson Yards also provides for more than 1,300 new or permanently preserved affordable units onsite and in the neighborhood, 14 acres of public space and a new K-8 public school.

Former Mayor Mike Bloomberg launched the project about six years ago after his bid for a West Side stadium failed. Bloomberg committed billions of taxpayer dollars to extend the 7 train to the location first, and now, the city’s new skyline sits atop the LIRR railyard.

While the first phase of the huge real estate project opened Friday, a $9 billion second phase, with several more towers and a school, is planned for the years ahead.